Portion of a vial



FIG. 1 is a front perspective view of a portion of a vial showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevation view

FIG. 5 is a front elevation view; and,

FIG. 6 is a side elevation view, the opposite side being a mirror image thereof.

In the drawing views, the dash-dot lines represent the bounds of the claim, and all other broken lines are included for the purpose of illustrating the unclaimed portions of the vial. None of the broken lines form a part of the claimed design. 

The ornamental design for a portion of a vial, as shown and described. 